Pub Date : 2026-01-30DOI: 10.1109/TMAG.2025.3650089
{"title":"IEEE Magnetics Society Distinguished Lecturers for 2026–2027","authors":"","doi":"10.1109/TMAG.2025.3650089","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3650089","url":null,"abstract":"","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 2","pages":"1-3"},"PeriodicalIF":1.9,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11369240","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146082291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-30DOI: 10.1109/TMAG.2026.3659540
{"title":"TechRxiv: Share Your Preprint Research with the World!","authors":"","doi":"10.1109/TMAG.2026.3659540","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3659540","url":null,"abstract":"","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 2","pages":"1-1"},"PeriodicalIF":1.9,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11369412","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146082309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-22DOI: 10.1109/TMAG.2026.3657033
P. Jacko;M. Bereš;P. Duranka;R. Varga
Bistable amorphous microwires enable time-domain sensing through abrupt magnetization switching but typically require complex electronic interfaces with bipolar supplies. This article presents a single-chip bistable microwire sensor interface based on the STM32G474RE microcontroller using a bifilar excitation coil to generate an effective bipolar magnetic field from a unipolar supply, eliminating the need for dc–dc converters, symmetrical power rails, and external amplifiers. Experimental results demonstrate reliable microwire switching and linear displacement measurement over a 5.25 mm range with a resolution down to 10 μm. The proposed solution significantly reduces component count, size, and complexity, making it suitable for embedded and internet of things (IoT) applications.
{"title":"Bistable Microwire Usage as the Sensor for Single-Chip Applications With Bifilar Excitation Coil","authors":"P. Jacko;M. Bereš;P. Duranka;R. Varga","doi":"10.1109/TMAG.2026.3657033","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3657033","url":null,"abstract":"Bistable amorphous microwires enable time-domain sensing through abrupt magnetization switching but typically require complex electronic interfaces with bipolar supplies. This article presents a single-chip bistable microwire sensor interface based on the STM32G474RE microcontroller using a bifilar excitation coil to generate an effective bipolar magnetic field from a unipolar supply, eliminating the need for dc–dc converters, symmetrical power rails, and external amplifiers. Experimental results demonstrate reliable microwire switching and linear displacement measurement over a 5.25 mm range with a resolution down to 10 μm. The proposed solution significantly reduces component count, size, and complexity, making it suitable for embedded and internet of things (IoT) applications.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 3","pages":"1-4"},"PeriodicalIF":1.9,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147383059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-15DOI: 10.1109/TMAG.2026.3654873
N. Strelkov;S. Dounia;L. Cuchet;C. Ducruet;J. R. Childress
We investigate a magnetic tunnel junction (MTJ) with a pinned synthetic antiferromagnet (SAF) under the influence of an in-plane magnetic field applied at an angle to the SAF reference direction. The conductance of such an MTJ pillar deviates from a perfect cosine-like angle dependence primarily due to the presence of uniaxial anisotropy in the free layer (FL) and the finite values of the pinning field and Ruderman–Kittel–Kasuya–Yosida (RKKY) coupling, which stabilize the SAF. We also consider other causes for the occurrence of angular error, such as the stray field from the SAF and the “orange peel” coupling effect. We develop a theory considering deviations of MTJ conductance up to the third harmonic based on the single domain (macrospin) approximation, allowing us to predict the angular error based on measured parameters at the thin-film level.
{"title":"Angular Evolution of Magnetoresistance in Magnetic Tunnel Junctions With Synthetic Antiferromagnets","authors":"N. Strelkov;S. Dounia;L. Cuchet;C. Ducruet;J. R. Childress","doi":"10.1109/TMAG.2026.3654873","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3654873","url":null,"abstract":"We investigate a magnetic tunnel junction (MTJ) with a pinned synthetic antiferromagnet (SAF) under the influence of an in-plane magnetic field applied at an angle to the SAF reference direction. The conductance of such an MTJ pillar deviates from a perfect cosine-like angle dependence primarily due to the presence of uniaxial anisotropy in the free layer (FL) and the finite values of the pinning field and Ruderman–Kittel–Kasuya–Yosida (RKKY) coupling, which stabilize the SAF. We also consider other causes for the occurrence of angular error, such as the stray field from the SAF and the “orange peel” coupling effect. We develop a theory considering deviations of MTJ conductance up to the third harmonic based on the single domain (macrospin) approximation, allowing us to predict the angular error based on measured parameters at the thin-film level.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 3","pages":"1-12"},"PeriodicalIF":1.9,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147383062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-15DOI: 10.1109/TMAG.2026.3654683
Shixuan Feng;Xingle Chen
Pulsed eddy current testing (PECT) is an electromagnetic nondestructive inspection technology capable of detecting pipe corrosion in-service without the need to remove the insulation coating. However, current PECT inspection methods based on intact conductor models lack sufficient accuracy in quantitative evaluation of localized corrosion defects, restricting their wider application. Based on the analytical model of the intact metal plate, this article develops a defect equivalent source model to analytically solve the eddy current field of conductors containing flat-bottomed hole defects, thereby improving computational accuracy and efficiency. First, artificial current excitation sources are introduced in the defect region to establish a defect equivalent source model, and the boundary-value problem for this model is solved. Then an iterative algorithm is employed to determine the defect equivalent source magnitudes based on the condition that the total current density within the defect region is zero. Subsequently, the time-domain analytical solution for the induced voltage in the PECT of the metal plate with defects is derived using the superposition principle. Finally, experiments on an aluminum alloy plate containing cylindrical flat-bottom hole defects validate the accuracy of the proposed defect equivalent source model and demonstrate its feasibility and advantages in analytically solving the eddy current field involving defects. The findings significantly enrich the analytical methods for defect-containing eddy current field and lay a theoretical foundation for innovation in PECT technology for localized corrosion defects.
{"title":"Analytical Method for Pulsed Eddy Current Field of Flat-Bottomed Hole Defect Based on Defect Equivalent Source Model","authors":"Shixuan Feng;Xingle Chen","doi":"10.1109/TMAG.2026.3654683","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3654683","url":null,"abstract":"Pulsed eddy current testing (PECT) is an electromagnetic nondestructive inspection technology capable of detecting pipe corrosion in-service without the need to remove the insulation coating. However, current PECT inspection methods based on intact conductor models lack sufficient accuracy in quantitative evaluation of localized corrosion defects, restricting their wider application. Based on the analytical model of the intact metal plate, this article develops a defect equivalent source model to analytically solve the eddy current field of conductors containing flat-bottomed hole defects, thereby improving computational accuracy and efficiency. First, artificial current excitation sources are introduced in the defect region to establish a defect equivalent source model, and the boundary-value problem for this model is solved. Then an iterative algorithm is employed to determine the defect equivalent source magnitudes based on the condition that the total current density within the defect region is zero. Subsequently, the time-domain analytical solution for the induced voltage in the PECT of the metal plate with defects is derived using the superposition principle. Finally, experiments on an aluminum alloy plate containing cylindrical flat-bottom hole defects validate the accuracy of the proposed defect equivalent source model and demonstrate its feasibility and advantages in analytically solving the eddy current field involving defects. The findings significantly enrich the analytical methods for defect-containing eddy current field and lay a theoretical foundation for innovation in PECT technology for localized corrosion defects.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 3","pages":"1-9"},"PeriodicalIF":1.9,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147383117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-15DOI: 10.1109/TMAG.2026.3654469
A. S. Silva;D. V. Silva;E. Galego;L. P. Barbosa;R. G. T. Fim;R. N. Faria
This study investigates the correlation between the squareness factor (SF) and the squareness ratio (SQ) for sintered $mathrm{Nd}_{14.5} mathrm{Dy}_{1.5} mathrm{Fe}_{76} mathrm{Nb}_1 mathrm{~B}_7, mathrm{Nd}_{17} mathrm{Fe}_{76.5} mathrm{Cu}_{1.5} mathrm{~B}_5$ , and $mathrm{Nd}_{16} mathrm{Fe}_{76} mathrm{~B}_8$ magnets, aiming to expand the range of SFs through controlled variations in composition and milling time. The magnets have been fabricated via powder metallurgy and characterized using demagnetization curves. The SF has been determined by the conventional ratio of the knee demagnetization field ($H_k$ ) to intrinsic coercivity ($i H_c$ ). The SQ has been calculated by the ratio between the numerically integrated area under the intrinsic demagnetization curve and the corresponding ideal maximum area of a perfectly square or rectangular loop. Results indicate that the SF varies significantly with alloy composition and milling duration, with values ranging from 0.48 to 0.94. The $mathrm{Nd}_{17} mathrm{Fe}_{76.5} mathrm{Cu}_{1.5} mathrm{~B}_5$ alloy exhibited the lowest SF (0.48), whereas the Dy -containing $mathrm{Nd}_{14.5} mathrm{Dy}_{1.5} mathrm{Fe}_{76} mathrm{Nb}_1 mathrm{~B}_7$ reached the highest one (0.94). In addition, microstructural analysis revealed heterogeneous grain structures influenced by milling time and elemental composition. Roundness (SD5) and rectangularity $(R)$ parameters have also been introduced to further characterize the loop shape, revealing a general trend in relation to the SQ values. The findings suggest that standard SF remains the most reliable parameter for defining the squareness of sintered rare-earth magnets, particularly those with well-defined demagnetization curves. In contrast, the SQ, while useful for comparison, is less effective for magnets with lower SF. This study provides insights into optimizing magnet manufacturing for tailored squareness properties, contributing to improved design and performance of sintered rare-earth-based permanent magnets.
{"title":"Relation Between Squareness Factor and the Area Under the Demagnetization Curve of Rare Earth Magnets","authors":"A. S. Silva;D. V. Silva;E. Galego;L. P. Barbosa;R. G. T. Fim;R. N. Faria","doi":"10.1109/TMAG.2026.3654469","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3654469","url":null,"abstract":"This study investigates the correlation between the squareness factor (SF) and the squareness ratio (SQ) for sintered <inline-formula> <tex-math>$mathrm{Nd}_{14.5} mathrm{Dy}_{1.5} mathrm{Fe}_{76} mathrm{Nb}_1 mathrm{~B}_7, mathrm{Nd}_{17} mathrm{Fe}_{76.5} mathrm{Cu}_{1.5} mathrm{~B}_5$ </tex-math></inline-formula>, and <inline-formula> <tex-math>$mathrm{Nd}_{16} mathrm{Fe}_{76} mathrm{~B}_8$ </tex-math></inline-formula> magnets, aiming to expand the range of SFs through controlled variations in composition and milling time. The magnets have been fabricated via powder metallurgy and characterized using demagnetization curves. The SF has been determined by the conventional ratio of the knee demagnetization field (<inline-formula> <tex-math>$H_k$ </tex-math></inline-formula>) to intrinsic coercivity (<inline-formula> <tex-math>$i H_c$ </tex-math></inline-formula>). The SQ has been calculated by the ratio between the numerically integrated area under the intrinsic demagnetization curve and the corresponding ideal maximum area of a perfectly square or rectangular loop. Results indicate that the SF varies significantly with alloy composition and milling duration, with values ranging from 0.48 to 0.94. The <inline-formula> <tex-math>$mathrm{Nd}_{17} mathrm{Fe}_{76.5} mathrm{Cu}_{1.5} mathrm{~B}_5$ </tex-math></inline-formula> alloy exhibited the lowest SF (0.48), whereas the Dy -containing <inline-formula> <tex-math>$mathrm{Nd}_{14.5} mathrm{Dy}_{1.5} mathrm{Fe}_{76} mathrm{Nb}_1 mathrm{~B}_7$ </tex-math></inline-formula> reached the highest one (0.94). In addition, microstructural analysis revealed heterogeneous grain structures influenced by milling time and elemental composition. Roundness (SD5) and rectangularity <inline-formula> <tex-math>$(R)$ </tex-math></inline-formula> parameters have also been introduced to further characterize the loop shape, revealing a general trend in relation to the SQ values. The findings suggest that standard SF remains the most reliable parameter for defining the squareness of sintered rare-earth magnets, particularly those with well-defined demagnetization curves. In contrast, the SQ, while useful for comparison, is less effective for magnets with lower SF. This study provides insights into optimizing magnet manufacturing for tailored squareness properties, contributing to improved design and performance of sintered rare-earth-based permanent magnets.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 3","pages":"1-8"},"PeriodicalIF":1.9,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147383064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-14DOI: 10.1109/TMAG.2026.3654058
Filip Vučić;Davor Dobrota
Building on our previous work, we propose a novel series expansion for the mutual inductance of two coaxial thick cylindrical coils with rectangular cross section, where the outer radius of one coil is smaller than or equal to the inner radius of the other. The obtained expansion contains hypergeometric functions and converges absolutely for all aforementioned configurations. Unlike previous semi-analytical methods that are mostly based on reducing the sixfold integral to simpler expressions, followed by numerical integration, our approach is the first fully analytical calculation method for radially separated coils. We tackle the numerical challenges associated with evaluating the hypergeometric functions and implement them in highly performant C code. We find that our approach is in excellent agreement with state-of-the-art semi-analytical approaches, matching their accuracy (14–15 significant digits) and surpassing previously achieved performance. Accuracy is reduced to eight significant digits only when the outer radius of the primary coil is the same as the inner radius of the secondary coil. Noting the algebraic convergence in this regime, we estimate the remainder of the sum, improving accuracy by one to two orders of magnitude.
{"title":"Analytical Calculation of Mutual Inductance Between Two Coaxial Thick Coils With Rectangular Cross Section Using Modified Bessel and Hypergeometric Functions","authors":"Filip Vučić;Davor Dobrota","doi":"10.1109/TMAG.2026.3654058","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3654058","url":null,"abstract":"Building on our previous work, we propose a novel series expansion for the mutual inductance of two coaxial thick cylindrical coils with rectangular cross section, where the outer radius of one coil is smaller than or equal to the inner radius of the other. The obtained expansion contains hypergeometric functions and converges absolutely for all aforementioned configurations. Unlike previous semi-analytical methods that are mostly based on reducing the sixfold integral to simpler expressions, followed by numerical integration, our approach is the first fully analytical calculation method for radially separated coils. We tackle the numerical challenges associated with evaluating the hypergeometric functions and implement them in highly performant C code. We find that our approach is in excellent agreement with state-of-the-art semi-analytical approaches, matching their accuracy (14–15 significant digits) and surpassing previously achieved performance. Accuracy is reduced to eight significant digits only when the outer radius of the primary coil is the same as the inner radius of the secondary coil. Noting the algebraic convergence in this regime, we estimate the remainder of the sum, improving accuracy by one to two orders of magnitude.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 3","pages":"1-11"},"PeriodicalIF":1.9,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11352990","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147383119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-12DOI: 10.1109/TMAG.2026.3652020
L. Provázková;D. Olekšáková;P. Kollár;J. Adamko;M. W. Najgebauer
The soft magnetic compacted powdered materials are used in a variety of electromagnetic applications such as electromotors, magnetic circuits of valves, cores for various inductors in computers, relays, disk drives, printers, hearing aid devices, and others. These materials are used due to their relatively easy magnetization and demagnetization, maximum permeability, high magnetic saturation induction, low coercivity, and low core losses. Soft magnetic compacted powder materials have high application potential based on isotropic 3-D behavior, mechanical stability, and low-cost production, and they offer the possibility for environmentally friendly recycling. This work focuses on the detailed description of the energy loss separation for dc and ac low-frequency magnetic fields of Fe-based compacted powder. We analyzed magnetic losses of the soft magnetic materials consisting of insulated iron particles according to Bertotti’s theories. The surfaces of the iron powder particles were mechanically smoothed and the ring-shaped compacts were prepared by high-pressure compaction. The analysis of total energy losses revealed the best magnetic properties of the material with mechanically smoothed surfaces of powder particles. Particular attention was paid to the processes of mechanical surface treatment of powder particles, coating and pressing, which have a major influence on the final properties of the materials. It is expected that optimization of these processes can significantly reduce energy losses and improve the magnetic properties of the materials.
{"title":"Influence of Mechanical Milling Intensity and Powder Surface Treatment on Energy Losses of Fe Compacts","authors":"L. Provázková;D. Olekšáková;P. Kollár;J. Adamko;M. W. Najgebauer","doi":"10.1109/TMAG.2026.3652020","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3652020","url":null,"abstract":"The soft magnetic compacted powdered materials are used in a variety of electromagnetic applications such as electromotors, magnetic circuits of valves, cores for various inductors in computers, relays, disk drives, printers, hearing aid devices, and others. These materials are used due to their relatively easy magnetization and demagnetization, maximum permeability, high magnetic saturation induction, low coercivity, and low core losses. Soft magnetic compacted powder materials have high application potential based on isotropic 3-D behavior, mechanical stability, and low-cost production, and they offer the possibility for environmentally friendly recycling. This work focuses on the detailed description of the energy loss separation for dc and ac low-frequency magnetic fields of Fe-based compacted powder. We analyzed magnetic losses of the soft magnetic materials consisting of insulated iron particles according to Bertotti’s theories. The surfaces of the iron powder particles were mechanically smoothed and the ring-shaped compacts were prepared by high-pressure compaction. The analysis of total energy losses revealed the best magnetic properties of the material with mechanically smoothed surfaces of powder particles. Particular attention was paid to the processes of mechanical surface treatment of powder particles, coating and pressing, which have a major influence on the final properties of the materials. It is expected that optimization of these processes can significantly reduce energy losses and improve the magnetic properties of the materials.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 3","pages":"1-4"},"PeriodicalIF":1.9,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147383067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This work studies a magneto-optical surface plasmon resonance (MOSPR) sensor design that uses the photonic spin Hall effect (PSHE) concept, including cerium-substituted yttrium iron garnet (CeYIG) and graphene to allow for very sensitive detection of magnetic fields at 632.8 nm. When subjected to a magnetic field, the CeYIG layer exhibits anisotropic optical behavior, explained by a permittivity tensor with nonzero off-diagonal components, thereby inducing magneto-optical (MO) activity. The magnetization is oriented along the $z$ -axis, normal to the sensor surface. Notably, the proposed design achieves an extraordinary transverse spin-dependent shift (SDS) of approximately 237.93 $mu$ m with the external orbital angular momentum (EOAM)-based centroid shift of 0.508 $mu$ m at resonance angle. This enhancement has enabled the MOSPR sensor to use as an ultra-sensitive PSHE-based magnetometer, with a maximal sensitivity of 11258.36 $mu$ m/RIU at a refractive index (RI) of 1.1 for detecting minute RI variations in the sensing medium (SM). The proposed MOSPR sensor, performance enhanced by the integration of CeYIG and graphene with PSHE, demonstrates the importance of this sensor for next-generation MO sensing devices.
{"title":"Highly Sensitive Magneto-Optical SPR Sensor Based on the Photonic Spin Hall Effect With CeYIG and Graphene","authors":"Saumya Pandey;Harshit Shukla;Vimal Mishra;Sarika Pal;Yogendra Kumar Prajapati;Alka Verma","doi":"10.1109/TMAG.2025.3650609","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3650609","url":null,"abstract":"This work studies a magneto-optical surface plasmon resonance (MOSPR) sensor design that uses the photonic spin Hall effect (PSHE) concept, including cerium-substituted yttrium iron garnet (CeYIG) and graphene to allow for very sensitive detection of magnetic fields at 632.8 nm. When subjected to a magnetic field, the CeYIG layer exhibits anisotropic optical behavior, explained by a permittivity tensor with nonzero off-diagonal components, thereby inducing magneto-optical (MO) activity. The magnetization is oriented along the <inline-formula> <tex-math>$z$ </tex-math></inline-formula>-axis, normal to the sensor surface. Notably, the proposed design achieves an extraordinary transverse spin-dependent shift (SDS) of approximately 237.93 <inline-formula> <tex-math>$mu$ </tex-math></inline-formula>m with the external orbital angular momentum (EOAM)-based centroid shift of 0.508 <inline-formula> <tex-math>$mu$ </tex-math></inline-formula>m at resonance angle. This enhancement has enabled the MOSPR sensor to use as an ultra-sensitive PSHE-based magnetometer, with a maximal sensitivity of 11258.36 <inline-formula> <tex-math>$mu$ </tex-math></inline-formula>m/RIU at a refractive index (RI) of 1.1 for detecting minute RI variations in the sensing medium (SM). The proposed MOSPR sensor, performance enhanced by the integration of CeYIG and graphene with PSHE, demonstrates the importance of this sensor for next-generation MO sensing devices.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 2","pages":"1-9"},"PeriodicalIF":1.9,"publicationDate":"2026-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146082289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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